11

NATO/CCMS PILOT STUDYNATO/CCMS PILOT STUDY

Prevention and Remediation In Selected Industrial Prevention and Remediation In Selected Industrial SectorsSectors: :

Small Sites in Small Sites in Urban Urban AreasAreas

AthensAthens, , GreeceGreeceJune June 33--5, 20065, 2006

22

INVESTIGATION AND INVESTIGATION AND REMEDIATION OF SITES REMEDIATION OF SITES CONTAMINATED WITH CONTAMINATED WITH

PETROLEUM HYDROCARBONS PETROLEUM HYDROCARBONS IN LITHUANIAIN LITHUANIA

Hydrogeological Company Hydrogeological Company “Grota”“Grota”

RamunėRamunė ŠečkuvienėŠečkuvienė

33

Lithuania exclusively usesLithuania exclusively usesonly groundwater foronly groundwater forpotable water resources potable water resources

Petroleum is not only thePetroleum is not only themain source of energy atmain source of energy atpresent day, however, itpresent day, however, itconsidered to be the mainconsidered to be the mainsource of groundwater source of groundwater contamination in Lithuaniacontamination in Lithuania

44

OUTLINEOUTLINE•• Background information.Background information.•• Assessment and Assessment and

remediation standards.remediation standards.•• CContaminationontamination ratingrating..•• Cleaning technologies Cleaning technologies

and results. and results. •• Example sites.Example sites.•• Theoretic and real Theoretic and real

possibilities of cleaning possibilities of cleaning subsurface and subsurface and groundwater from PH in groundwater from PH in Lithuania.Lithuania.

•• Groundwater monitoring Groundwater monitoring of contaminated sites.of contaminated sites.

55

Background informationBackground information–– Number and total area of sites Number and total area of sites contaminated with PH is relativelycontaminated with PH is relativelythe the biggestbiggest, compeering with other , compeering with other polluted areas.polluted areas.–– There are more than 650 petrolThere are more than 650 petrolstations in Lithuania and 250 of stations in Lithuania and 250 of them are old ones. The total amount them are old ones. The total amount of contaminated of contaminated aarearea there exceeds there exceeds 33--5 5 mlnmln. m. m22..–– Total area of oil business objects Total area of oil business objects in Lithuania makes up 600 in Lithuania makes up 600 -- 700 ha, 700 ha, but contaminated groundwater but contaminated groundwater below it occupies 52below it occupies 52--62 62 mlnmln. . mm22..–– Former Soviet Union objectsFormer Soviet Union objectsmmakeake aa single pollution source. single pollution source. The indirect data show that such The indirect data show that such objects occupies about 3 objects occupies about 3 mlnmln. . mm22..

66

Assessment and remediation standardsAssessment and remediation standards

Environment protection lawEnvironment protection law

Environment monitoring lEnvironment monitoring laaww

Local groundwater monitoring implementation order Local groundwater monitoring implementation order

LAND 9LAND 9--2002 2002 –– Remediation and pollution limitation Remediation and pollution limitation requirements of subsurface and groundwater contaminatedrequirements of subsurface and groundwater contaminated

with petroleum hydrocarbonswith petroleum hydrocarbons

77

Main pollution level indicesMain pollution level indicesPollution levelPollution level

IndexIndexDimDimensiensionon BackgBackg

roundround LowLow MediumMedium HighHigh Very highVery high

Max depth of oil Max depth of oil penetrationpenetration -- 00

To 60To 60--7070% % of of vadosevadose

zone depthzone depth

To To groundwagroundwa

ter ter capillary capillary

zonezone

To To shallow shallow groundgroundwaterwater

To shallow To shallow groundwatergroundwater

Oil content in Oil content in vadosevadosezone soilzone soil g/kgg/kg <0.05<0.05 0.050.05--1515 0.050.05--1515 >0.05>0.05 >0.05>0.05

Oil content in top Oil content in top soils of shallow soils of shallow aquiferaquifer

g/kgg/kg <0.05<0.05 <0.05<0.05 0.050.05--55 55--2525 >25>25

Oil content in shallow Oil content in shallow groundwatergroundwater Mg/lMg/l 00 <1<1 11--1010 1010--5050 >50>50

Free phase of Free phase of petroleum product on petroleum product on shallow aquifershallow aquifer

-- 00 00 00 EpisoEpisodicdic ConstatntConstatnt

88PH contamination level in LithuaniaPH contamination level in Lithuania

99

Shallow aquifer contamination ratesShallow aquifer contamination rates in in large oil storageslarge oil storages

Territory

Shallow aquifer

pollution area,

km2

Max concentration

of PH in water,

mg/l

Alytus oil storage 0.405 12.8

Train accident site at Juodšiliai 0.18 7-12

Kaunas oil storage 0.0239 1320

Klaipėda oil storage 0.0535 188

Varėna oil storage 0.01 94.8

Viduklė oil storage 0.044 0.19

Vilnius oil storage 0.3 77

1010

Contamination of shallow aquifer at Contamination of shallow aquifer at former military sitesformer military sites

M i l i t a r y s i t e

S h a l l o w

a q u i f e r

p o l l u t i o n a r e a ,

k m 2

M a x

c o n c e n t r a t i o n

o f P H i n

w a t e r , m g / l

K ė d a i n i a i l a n d i n g - f i e l d 0 . 4 2 6

P a g ė g i a i o i l s t o r a g e 0 . 1 4 1 3

P a j u o s t ė l a n d i n g - f i e l d 0 . 1 3 6 . 4 – 4 . 2

K a r m ė l a v a r o c k e t f u e l s t o r a g e 0 . 0 0 8 3 . 1

P i l a i n i a i e n g i n e e r i n g r e g i m e n t a l

o i l s t o r a g e0 . 0 3 0 . 2 2

A l y t u s l a n d i n g p a r t y 0 . 0 0 1 5 1 . 4 7

P a b r a d ė o i l s t o r a g e 0 . 0 2 1 1 5K a z l ų R ū d a o i l s t o r a g e 0 . 0 3 2 2 . 5

V a l č i ū n a i o i l s t o r a g e 0 . 1 3 8

R a u d o n d v a r i s r o c k e t b a s e 0 . 0 1 0 . 6 4

K a i r i a i t a n k - b o r n e i n f a n t r y 0 . 0 3 3 . 1 5

Z o k n i a i l a n d i n g - f i e l d 1 1 0 . 5

N e m e n č i n ė c i v i l d e f e n c e c e n t e r 0 . 0 3 3 5

“ Š i a u r ė s m i e s t e l i s ” ( “ N o r t h e r n t o w n ” )

i n V i l n i u s0 . 0 1 4 1 . 3

1111

Cleaning technologiesCleaning technologies

•• Ex situEx situ: bioremediation using bacteria and : bioremediation using bacteria and some plants.some plants.

•• In situIn situ: pump and treat; vacuum : pump and treat; vacuum extraction; bioremediation using bacteria.extraction; bioremediation using bacteria.

HydrogeologicalHydrogeological Company “Company “GrotaGrota” is ” is probably the one in the country who has the probably the one in the country who has the biggest experience using the biggest experience using the in situin situ site site remediation methodology.remediation methodology.

1212

Petroleum hydrocarbons spilled out on the railway Petroleum hydrocarbons spilled out on the railway Ex situEx situ

Bioremediation siteBioremediation site Remedied territoryRemedied territory

1313

⇐

⇒

Water level

Free phase PHlayer

Free phase PHlayer level

Pump

To abstergent facilitySurface

““ Pum

p an

d tr

eat”

on

Pum

p an

d tr

eat”

on

the

surf

ace

the

surf

ace

““ Pump and treat” m

ethodPum

p and treat” method

scheme

schemeIn

situ

In s

itu

1414

⇐

⇒

Vacuum extraction system

Vacuum extraction system

Vacu

um e

xtra

ctio

n sy

stem

Vacu

um e

xtra

ctio

n sy

stem

on t

he s

urfa

ceon

the

sur

face

Vacuum pumpUnderground

container

Pumpingpipe

Air flow

Free phase of PH

Air flow

PH-water-gasseparator

Container forPH

Water cleaningsystem Gas cleaning

Air outgo

Water outgo

LEGEND

PH gas

PH adsorbedinto the soil

PH dissolvedinto the water

1515

Info about the biggest contaminated sitesInfo about the biggest contaminated sites

Indicator Vilnius oil

storage

Train accident

site at Juodšiliai

Alytus oil

storage

Investigation wells, number 162 140 57

Contaminated aquifers:

Contaminated soil thickness, m 5-7 2-4 7-11

Index a III-IV,

ag III-II vr-žm ag III bl

a III,

ag II žm – I dn

Lithology

Various grained

sand, gravel;

K = 120; 2-5 m/d

Fine, sometimes

various grained

sand;

K = 0.9-8.9;

11-32 m/d

Fine and medium

grained,

somewhere clayey

sand and gravel;

K = 1-20 m/d

36 23 15

Monitoring:

- observation wells, number

- observation period, years 10 5 4

1616

PH appeared in springs PH appeared in springs near the circular road near the circular road crossing. Furthermore, crossing. Furthermore,

Vilnius oil storage Vilnius oil storage is nearby two drinking is nearby two drinking

water water wellfieldswellfields and it is and it is located located

1090 m from river 1090 m from river NerisNeris. .

Vilnius oilstorage

Vingiswellfield

II Geležinkeliečiųwellfield

The 3-rd health preservation belt of wellfield

The 2-nd health preservation belt of wellfield

1717

Diesel fuel spilled out of Diesel fuel spilled out of four tanksfour tanks--cars and spread cars and spread

over the land surface in over the land surface in a plot 182 m long and a plot 182 m long and

22--18 m wide. The polluted 18 m wide. The polluted area is situated at the area is situated at the southern outskirts of southern outskirts of

JuodJuodššiliaiiliai settlement. The settlement. The nearest dug well providing nearest dug well providing

drinking water is 62 m from polluted area.

Train accident siteat Juodšiliai

Paneriaiwellfield

The 3

-rd health

preservation

belt of wellfield

drinking water is 62 m from polluted area.

1818

Contamination of shallow Contamination of shallow aquifer in aquifer in AlytusAlytus oil oil storage caused the storage caused the

pollution of deep aquifers pollution of deep aquifers in in VidzgirisVidzgiris wellfieldwellfield..

Alytus oilstorage

The 3-rd health preservation belt of wellfield

The 2-nd health preservation belt of wellfield

Vidzgiriswellfield

1919

The results of cleaningThe results of cleaning

IndicatorVilnius oil

storage

Train

accident site

at Juodšiliai

Alytus oil

storage

Contamination area, m2 318000 4485 405000

- shallow aquifer 318000 4485 405000

- soil 228800 1803 285000

- free phase PH layer 132000 600 18125

Extracted PH amount, m3 2704 20 94

Extraction beginning date 1989 2000 1996

Extraction period, years 9 7 months2.5 (with

breaks)

2020Viln

ius

oil s

tora

ge b

efor

e an

d af

ter

rem

edia

tion

Viln

ius

oil s

tora

ge b

efor

e an

d af

ter

rem

edia

tion

2121

Residual pollution of subsurface and shallow groundwater Residual pollution of subsurface and shallow groundwater with PH after the cleaning of the railway accident sitewith PH after the cleaning of the railway accident site

LEGENDLEGENDBoundary of former PH spilled out on the groundBoundary of former PH spilled out on the ground

Boundary of dissolved PH spreading in shallow aquiferBoundary of dissolved PH spreading in shallow aquifer

Boundary of capillary PH spreading in the aeration zoneBoundary of capillary PH spreading in the aeration zone

2222

28Rotuðësaikðtë

Rût

ø g-

vë

Kep

yklo

s g-v

ë

00 200 400

The 3The 3--rd health preservative rd health preservative belt of belt of wellfieldwellfield

The 2The 2--nd health preservative nd health preservative belt of belt of wellfieldwellfield

VidzgirisVidzgiris wellfield

wellfieldNemunasNemunas

Situation in Situation in AlytusAlytus oiloilstoragestorage

after remediationafter remediation

2323

Info about some objects, where Info about some objects, where remediationremediationis in processis in process

Indicator Passengers and

shipment terminal

Petrol station in Panevėžys

Investigation wells, number 33 21

Contaminated soil thickness,

m 1.3-4.5 1-2.5

Contaminated aquifers:

Index a III a III

Lithology

Various grained

sand, gravel;

K = 6.8 – 29.5 m/d

Fine grained clayey

sand;

K = 0.3 m/d

8 3

Monitoring:

- observation wells, number

- observation period, years 5 8

2424

CuronianCuronian

SpitSpit

Balti

c Se

aBa

ltic

Sea

Passengers andPassengers andShipment terminalShipment terminal

Current territory was built Current territory was built near near CuronianCuronian Spit in 1977. Spit in 1977.

It is being used to serve the It is being used to serve the port of port of KlaipėdaKlaipėda. .

The investigations have The investigations have shown that bigger part of the shown that bigger part of the

territory was contaminated with PH. And the territory was contaminated with PH. And the free phase PH layer have been detected on the surface of shallowfree phase PH layer have been detected on the surface of shallow

groundwater in the southern part of it.groundwater in the southern part of it.

2525

The results of cleaningThe results of cleaning

Indicator

Passengers

and

Shipment

Terminal

Petrol station in Panevėžys

Contamination area, m2 5700 2790

Extracted PH amount, m3 2.5 1

Extraction beginning date 2003 2003

Extraction period, years 3 3

2626

Residual pollution of shallow groundwater Residual pollution of shallow groundwater with liquid PH after 3 years cleaning processwith liquid PH after 3 years cleaning process

Boundary of liquid PH accumulated on Boundary of liquid PH accumulated on shallow groundwater before cleaningshallow groundwater before cleaningBoundary of liquid PH accumulated on Boundary of liquid PH accumulated on shallow groundwater after one year shallow groundwater after one year remediation workremediation workBoundary of liquid PH accumulated on Boundary of liquid PH accumulated on shallow groundwater after two years shallow groundwater after two years remediation workremediation work

LEGENDLEGEND

2727

Theoretic and real possibilities of cleaning Theoretic and real possibilities of cleaning subsurface and groundwater from PH in Lithuaniasubsurface and groundwater from PH in Lithuania

•• Requirement for remediation of the territories contaminated withRequirement for remediation of the territories contaminated with

petroleum hydrocarbons depends on the risk to the clean nature apetroleum hydrocarbons depends on the risk to the clean nature and nd

human health.human health.

•• According to Lithuanian specific conditions the main pupose of tAccording to Lithuanian specific conditions the main pupose of the he

limitation of subsurface contamination first of all is linked wilimitation of subsurface contamination first of all is linked with th

grounwater protectiongrounwater protection..

•• The principal task is the stopping of spreading of contaminant iThe principal task is the stopping of spreading of contaminant in n

aquifersaquifers. .

•• Free liquid phase hydrocarbon layer on gruondwater table is the Free liquid phase hydrocarbon layer on gruondwater table is the main main

factor stimulating the spreading of contamination in aquifersfactor stimulating the spreading of contamination in aquifers..

•• The principal condition for remediation of the territories with The principal condition for remediation of the territories with high and high and

very high contamination levels is the removal of free phase petrvery high contamination levels is the removal of free phase petroleum oleum

poduct.poduct.

2828

Groundwater monitoring Groundwater monitoring of contaminated sitesof contaminated sites

•• In sites contaminated with PH In sites contaminated with PH

during remediation process and during remediation process and

after it observation net were being after it observation net were being

appointed.appointed.

•• After the remediation process only After the remediation process only

adsorbed PH remained in the soil. adsorbed PH remained in the soil.

Thus, Thus, hydrogeodinamichydrogeodinamic and and

hydrogeochemicalhydrogeochemical monitoring is monitoring is

being held in such sites.being held in such sites.

•• The destruction of pollutant is much The destruction of pollutant is much

faster after the free phase of PH faster after the free phase of PH

extraction from the water surface.extraction from the water surface.

2929

Thank you ! ! !Thank you ! ! !